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221 Eos

Asteroid In The Asteroid Belt
Place asteroid Q148187

Facts

28 properties
Instance of
asteroid
Follows
220 Stephania[5]
Followed by
222 Lucia[6]
Absolute magnitude
7.73[16]
Albedo
0.14, 0.166
Apoapsis
3.316961901568579
Argument of periapsis
192.4815502102716
Asteroid family
Eos family[13]
Asteroid spectral type
S-type asteroid, K-type asteroid[11][12]
Diameter
95.469
Discoverer or inventor
Johann Palisa[2]
Epoch
November 21, 2025
Longitude of ascending node
141.7101615518745[21]
Mean anomaly
348.9514797329227
Minor planet group
asteroid belt[7]
Named after
Eos[4]
Orbital eccentricity
0.1010595253952547[15]
Orbital inclination
10.887, 10.89025188116619[17][18]
Orbital period
1909.822274076149[19]
Parent astronomical body
Sun[8]
Periapsis
2.708074574779722
Provisional designation
A882 BA[9]
Rotation period
10.443[20]
Semi-major axis of an orbit
3.012518238174151
Show all 28 facts +4
Significant event
naming[14]
Site of astronomical discovery
Vienna Observatory[3]
Time of discovery or invention
January 18, 1882[10]
Time of periapsis
2461059.113083616
🏷️ Also known as
en 221 Eos en (221) Eos en Eos de 221 Éos el 221 Ηώς fa سیارک ۲۲۱ fr (221) Éos fr 221 Éos fr Éos ja エオス pt 221 Éos ru (221) Eos ru (221) Эос ru Eos ru Эос th 221 อีออส uk 221 Еос vi (221) Eos vi A882 BA vi Eos
🔖 Identifiers · 5
DAMIT asteroid ID
1017
Freebase ID
/m/057zh9
JPL Small-Body Database SPK-ID
20000221
Minor Planet Center body ID
221
Wolfram Language entity code
Entity["MinorPlanet", "Eos"]

Report an error or request removal Lineage (PROV-JSON)

🔗 Connections
Asteroid spectral type 2
S-type asteroid, K-type asteroid
Asteroid family 1
Eos family
Discoverer or inventor 1
Johann Palisa
Epoch 1
November 21, 2025
Followed by 1
222 Lucia
Followed by (predecessor) 1
222 Lucia
Instance of 1
asteroid
Minor planet group 1
asteroid belt
Named after 1
Eos
Named after 1
Eos family
Parent astronomical body 1
Sun
Site of astronomical discovery 1
Vienna Observatory
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Summary

221 Eos is an asteroid[1].

Body

Cultural Significance

Things named for 221 Eos include Eos family[22], an asteroid family[23].

Why It Matters

Entities named for it include Eos family[22], an asteroid family[23].

Related Entities

Johann Palisa

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  2. [3] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  3. [4] ↑ . Dictionary of Minor Planet Names (Sixth Revised and Enlarged Edition). wikidata.org.
  4. [5] ↑ . Minor Planet Center database. wikidata.org.
  5. [6] ↑ . Minor Planet Center database. wikidata.org.
  6. [7] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  7. [8] ↑ . wikidata.org.
  8. [9] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  9. [10] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  10. [11] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  11. [12] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  12. [13] ↑ . wikidata.org.
  13. [14] ↑ . wikidata.org.
  14. [15] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  15. [16] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  16. [17] ↑ . wikidata.org.
  17. [18] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  18. [19] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  19. [20] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.
  20. [21] ↑ . JPL Small-Body Database. Retrieved . ssd.jpl.nasa.gov. Provenance: wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [22] ↑ . wikidata.org. → on this site

Inline context (facts about related entities)

  1. [23] ↑ . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). 221 Eos. Retrieved November 3, 2026, from https://4ort.xyz/entity/221-eos
MLA “221 Eos.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 Nov. 2026, https://4ort.xyz/entity/221-eos.
BibTeX @misc{4ortxyz_221-eos_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{221 Eos}}, year = {2026}, url = {https://4ort.xyz/entity/221-eos}, note = {Accessed: 2026-11-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): 221 Eos — https://4ort.xyz/entity/221-eos (retrieved 2026-11-03)

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